Thought he covered this in the post-match interview by saying it was 'complicated' and left it at that. I don't know how you'd let someone play with an existing stress fracture and then potentially increase the length of the recovery time as a result now. However, the medical staff probably knew what they were doing, we hope.
It could also be that the initial injury wasn't as bad as it seemed and the player didn't totally notice it till the two compounded on each other?